CN101907465A - Local access and wireless downloading combined map navigation method - Google Patents
Local access and wireless downloading combined map navigation method Download PDFInfo
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- CN101907465A CN101907465A CN200910111991XA CN200910111991A CN101907465A CN 101907465 A CN101907465 A CN 101907465A CN 200910111991X A CN200910111991X A CN 200910111991XA CN 200910111991 A CN200910111991 A CN 200910111991A CN 101907465 A CN101907465 A CN 101907465A
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Abstract
The invention discloses a local access and wireless downloading combined map navigation method, which is to provide navigation by using a local access and wireless downloading combined map processing mode, namely using a loaded grid map first and if the grid map of a required ID is not downloaded, extracting from local map data. The mode can ensure good user experience during map browsing and navigation and can reflect latest road condition and traffic information, so the navigation process can be carried out effectively and smoothly in time; and the adoption of the map data in the same data format by a navigation center and vehicle-mounted terminals enables the grid map data needed by the vehicle-mounted terminals to be acquired locally and directly or downloaded from the connected network navigation center, so the display and process mechanism of the map is more flexible and the locally stored map data of the vehicle-mounted terminals can be updated more conveniently with automatic update display for providing the latest map for navigation.
Description
Technical field
The present invention relates to a kind of air navigation aid, particularly relate to a kind of air navigation aid of the map that combines based on local access and wireless downloading.
Background technology
At present, two kinds of common terminal guidance systems are arranged, a kind of is local autonomous navigation system, this product has the GPS receiver, this locality stores electronic chart and navigation software, and the user only need import or select your destination after the title, and terminal device will calculate optimal path, be presented on the electronic chart, for reference; Another kind is the central site network navigational system, this product also has the GPS receiver, when the needs navigation Service, terminal sends to navigation center with relevant informations such as destinations, server operation by navigation center goes out optimal path, and guidance path and map are downloaded to navigation terminal by mobile wireless network.
Map is the important component part of navigational system, also is the fundamental of navigation procedure.In navigation procedure, the user not only wishes can browse very easily, check navigation map, and simultaneously they wish that also used map can real-time update, and show up-to-date traffic information.
Local map in the autonomous navigation system need regularly upgrade, often might be because the map renewal is untimely, and the variation of road and traffic makes navigation effect undesirable.Based on network navigate mode, can accomplish the real-time download and the real-time navigation of map, map upgrades operation only to be needed to finish at the center, and this mode need be connected to navigation center, the user need pay certain service fee, but whole navigation procedure is subjected to the restriction of network and influences.
The map of local independent navigation can not react up-to-date road and geography information, and is very simple on the map treatment flow process, gets map from this locality exactly, can't accomplish to upgrade automatically map.And the map download of central site network navigation is subject to the mobile communications network environment, and it directly obtains the map that needs from the center, and the network delay that this mode is brought may allow the user use and can't accept.Therefore how in the reality navigation, can guarantee that map and traffic information that the user uses are up-to-date, can operate the sensation that the no time difference postpones to the user again simultaneously and just seem particularly important, have only this two aspect to carry out, user experience well just can be arranged.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art, a kind of air navigation aid of the map that combines based on local access and wireless downloading is provided, good user experience is arranged in the time of both can having guaranteed map view and navigation, simultaneously can react up-to-date road conditions and transport information again, thereby guarantee the timely, effective and smooth conduct of navigation procedure.
The technical solution adopted for the present invention to solve the technical problems is: a kind of air navigation aid of the map that combines based on local access and wireless downloading comprises the display process to navigation map; This processing procedure comprises the steps:
A. the navigation center at far-end sets up the map data base that an electronic chart with this locality storage of car-mounted terminal has the identical data form; This map data base is the form that adopts grid map, under a pre-set engineer's scale, map is divided equally according to fixing sizing grid, under pre-designed grid ID numbering, with the grid is unit, and the map elements data of extracting grid inside generate the corresponding map data;
B. car-mounted terminal is according to the algorithm that pre-determines and utilize the latitude and longitude information of reference point to calculate the current map grid ID scope that shows of needing; Map grid ID scope includes minimum grid ID numbering and maximum mesh ID numbering;
C. whether car-mounted terminal is that local mode is judged to the map display mode; When being judged as when being, continue next step; When being judged as not, change step e;
D. car-mounted terminal extracts the map datum of grid ID one by one according to the map grid ID scope of current needs demonstration from local storage according to grid ID number order; After map datum has extracted, change step N;
E. car-mounted terminal sends the download such map requests that includes engineer's scale and grid ID scope by cordless communication network to the navigation center of far-end;
F. the engineer's scale uploaded according to car-mounted terminal of the navigation center of far-end and grid ID scope are transferred the corresponding map data distributing and are given car-mounted terminal from map data base;
G. car-mounted terminal is stored in the map datum that navigation center sent of far-end in the buffer area of car-mounted terminal;
H. whether car-mounted terminal is that network schemer is judged to the map display mode; When being judged as when being, continue next step; When being judged as not, change step J;
I. car-mounted terminal extracts the map datum of grid ID one by one according to the grid ID scope of current needs demonstration from buffer area according to grid ID number order; After map datum has extracted, change step N;
J. whether car-mounted terminal is judged in buffer area grid ID according to grid ID number order one by one according to the map grid ID scope that current needs show; When being judged as when being, change step K; When being judged as not, change step L;
K. car-mounted terminal extracts the map datum of corresponding grid ID from buffer area; Change step M;
L. car-mounted terminal extracts the map datum of corresponding grid ID from local storage;
M. whether car-mounted terminal is that the current maximum mesh ID numbering of the grid ID scope of demonstration that needs is judged to grid ID numbering; When being judged as when being, continue next step; When being judged as not, return step J;
N. the display process module of car-mounted terminal is carried out display process to the map datum that extracts.
Further, comprise also that in steps A navigation center carries out real-time update to map data base, the map datum after the renewal has the corresponding renewal check code with grid ID;
Comprise also that in step K the renewal check code that has the map datum of same grid ID from buffer area in the renewal check code of map datum of the grid ID that will extract and the local storage compares, when both are different, remove to upgrade the map datum that has same grid ID in the local storage with the map datum of the grid ID that extracts in the buffer area.
Described grid ID numbering is to be that initial point is (0,0) open numbering with latitude and longitude coordinates, and vertical and horizontal add one mode by each grid ID value respectively and increase progressively.
The described map grid ID scope that calculates current needs demonstration, it comprises the steps:
A. obtain the latitude and longitude information of reference point;
B. determine displayed map frame size according to the car-mounted terminal screen size, obtain the length and width value of displayed map frame;
C. get and decide the position of reference point in the ground picture frame;
D. converting to the reference point longitude and latitude with 1/1024 second is the value of unit;
E. with the length of ground picture frame with wide to convert to 1/1024 second be the value of unit;
What utilize f. that reference point coordinate and ground picture frame calculate ground the picture frame lower left corner and the upper right corner was the latitude and longitude value of unit with 1/1024 second;
G. obtaining grid length and width was the value of unit with 1/1024 second;
What h. obtain coordinate origin was the value of unit with 1/1024 second;
I. utilize origin, grid length and width value and the picture frame lower left corner, ground coordinate Calculation to go out the grid ID at place, the picture frame lower left corner, ground, this grid ID promptly is the minimum value of the scope of asking;
J. utilize origin, grid length and width value and the picture frame upper right corner, ground coordinate Calculation to go out the grid ID at place, the picture frame upper right corner, ground, this grid ID promptly is the maximal value of the scope of asking;
K. draw required grid ID scope, promptly grid ID minimum value is between the grid ID maximal value.
The air navigation aid of a kind of map that combines based on local access and wireless downloading of the present invention, tupe that can self-defined map, it is available to have three kinds of patterns, be local mode, network schemer or mixed mode, when selecting local mode for use, the map of demonstration is to extract from local map data stored resource; When selecting network schemer for use, the map of demonstration is the map datum resource that comes from navigation center; When selecting mixed mode for use, the map that shows is that the map datum of navigation center combines with local map data stored, in the time can obtaining the map datum of navigation center's download, take the map datum of navigation center, under the situation that does not have navigation center's map datum, adopt local map data stored, thereby guaranteed the no time difference wait in navigation and the map view process.
The invention has the beneficial effects as follows, because the map treatment mode that has adopted local access and wireless downloading to combine is navigated, promptly use the grid map of downloading earlier, if the grid map of required ID is not also downloaded, then from local map datum, extract, this mode has good user experience in the time of both can having guaranteed map view and navigation, can react up-to-date road conditions and transport information again simultaneously, thereby guarantee the timely, effective and smooth conduct of navigation procedure; Owing to adopted navigation center to set up the map data base that an electronic chart with this locality storage of car-mounted terminal has the identical data form at far-end, make the required grid map data of car-mounted terminal both can directly obtain from this locality, also can be by being connected to network navigation center wireless downloading, both can use local map datum separately, also can use the map datum of wireless downloading separately, make the display processing system of map more flexible, simultaneously, the renewal that also is the local map data stored of car-mounted terminal is convenient, can realize automatically upgrading, guarantee to have up-to-date map that navigation is provided.
Below in conjunction with embodiment the present invention is described in further detail; But the air navigation aid of a kind of map that combines based on local access and wireless downloading of the present invention is not limited to embodiment.
Embodiment
The air navigation aid of a kind of map that combines based on local access and wireless downloading of the present invention comprises the display process to navigation map; This processing procedure comprises the steps:
Steps A. the navigation center at far-end sets up the map data base that an electronic chart with this locality storage of car-mounted terminal has the identical data form; This map data base is the form that adopts grid map, under a pre-set engineer's scale, map is divided equally according to fixing sizing grid, under pre-designed grid ID numbering, with the grid is unit, and the map elements data of extracting grid inside generate the corresponding map data;
Wherein, grid ID numbering is to be that initial point is (0,0) open numbering with latitude and longitude coordinates, and vertical and horizontal add one mode by each grid ID value respectively and increase progressively;
Carry out map for the ease of car-mounted terminal and upgrade, comprise also in this steps A that navigation center carries out real-time update to map data base, the map datum after the renewal has the corresponding renewal check code with grid ID;
Step B. car-mounted terminal is according to the algorithm that pre-determines and utilize the latitude and longitude information of reference point to calculate the current map grid ID scope that needs demonstration; Map grid ID scope includes minimum grid ID numbering and maximum mesh ID numbering;
No matter be the map view or the demonstration of navigation map, all need to calculate the map grid ID scope Grid_ID[Min that needs obtain according to certain any latitude and longitude information]---Grid_ID[Max];
The step of the pairing map grid of reference point ID scope acquisition algorithm is as follows:
A. the latitude and longitude information of obtaining reference point for (longitude, latitude);
B. determine displayed map frame size according to the terminal screen size, long is frm_width, and wide is frm_height;
C. get and decide the position of reference point in the ground picture frame, horizontal direction occupies the center, and position is in vertical direction determined that by percent the percent span is 0-100; 0 expression reference point is at the bottommost of ground picture frame, and 100 expression reference point are at the top of ground picture frame, and other value is then represented reference point linear change between map frame bottom and top;
D. the reference point longitude and latitude is converted to (1/1024 second) be unit value (long_unit, lat_unit);
E. with the length of ground picture frame and wide convert to (1/1024 second) be unit value (frm_width_unit, frm_height_unit);
F. utilize reference point coordinate (long_unit, lat_unit) and ground picture frame (frm_width_unit, what frm_height_unit) can calculate the picture frame lower left corner, ground and the upper right corner is the latitude and longitude value of unit with (1/1024 second), be respectively (left_down_long_unit, left_down_lat_unit) and (right_top_long_unit, right_top_lat_unit);
G. obtain grid length and width with (1/1024 second) be unit value (grid_width_unit, grid_height_unit);
H. obtain coordinate origin with (1/1024 second) be unit value (original_long_unit, original_lat_unit);
I. utilize origin (original_long_unit, original_lat_unit), grid length and width value (grid_width_unit, grid_height_unit) and ground picture frame lower left corner coordinate (left_down_long_unit, left_down_lat_unit) can calculate the grid ID at place, the picture frame lower left corner, ground, this grid ID also is the minimum value Grid_ID[Min of the scope of asking];
J. utilize origin (original_long_unit, original_lat_unit), grid length and width value (grid_width_unit, grid_height_unit) and ground picture frame upper right corner coordinate (right_top_long_unit, right_top_lat_unit) can calculate the grid ID at place, the picture frame upper right corner, ground, this grid ID also is the maximal value Grid_ID[Max of the scope of asking];
K. drawing required grid ID scope is Grid_ID[Min]---Grid_ID[Max], promptly grid ID minimum value is between the grid ID maximal value;
Whether step C. car-mounted terminal is that local mode is judged to the map display mode; When being judged as when being, continue next step; When being judged as not, change step e;
Step D. car-mounted terminal extracts the map datum of grid ID one by one according to the map grid ID scope of current needs demonstration from local storage according to grid ID number order; After map datum has extracted, change step N;
Step e. car-mounted terminal sends the download such map requests that includes engineer's scale and grid ID scope by cordless communication network to the navigation center of far-end;
After the car-mounted terminal of this locality calculates the map grid ID scope that need use, the wireless downloading of corresponding ID grid map will be started; Car-mounted terminal uploads to navigation center with the data transmission channel (as GPRS) of related datas such as the grid ID scope of coordinate system, engineer's scale and request (Grid_ID[Min]-Grid_ID[Max]) by cordless communication network;
The such map requests data packet format of terminal is as follows:
Step F. the navigation center of far-end transfers the corresponding map data distributing to car-mounted terminal according to engineer's scale and grid ID scope that car-mounted terminal is uploaded from map data base;
The grid map data packet format that download at the center is as follows:
Step G. car-mounted terminal is stored in the map datum that navigation center sent of far-end in the buffer area of car-mounted terminal;
Whether step H. car-mounted terminal is that network schemer is judged to the map display mode; When being judged as when being, continue next step; When being judged as not, change step J;
Step I. car-mounted terminal extracts the map datum of grid ID one by one according to the grid ID scope of current needs demonstration from buffer area according to grid ID number order; After map datum has extracted, change step N;
Whether step J. car-mounted terminal is judged in buffer area grid ID according to grid ID number order one by one according to the map grid ID scope that current needs show; When being judged as when being, change step K; When being judged as not, change step L;
Step K. car-mounted terminal extracts the map datum of corresponding grid ID from buffer area; Change step M;
Step L. car-mounted terminal extracts the map datum of corresponding grid ID from local storage;
Whether step M. car-mounted terminal is that the current maximum mesh ID numbering of the grid ID scope of demonstration that needs is judged to grid ID numbering; When being judged as when being, continue next step; When being judged as not, return step J;
The display process module of step N. car-mounted terminal is carried out display process to the map datum that extracts.
Wherein:
Comprise also that in step K the renewal check code that has the map datum of same grid ID from buffer area in the renewal check code of map datum of the grid ID that will extract and the local storage compares, when both are different, remove to upgrade the map datum that has same grid ID in the local storage with the map datum of the grid ID that extracts in the buffer area.
The air navigation aid of a kind of map that combines based on local access and wireless downloading of the present invention, tupe that can self-defined map, it is available to have three kinds of patterns, be local mode, network schemer or mixed mode, when selecting local mode for use, the map of demonstration is to extract from local map data stored resource; When selecting network schemer for use, the map of demonstration is the map datum resource that comes from navigation center; When selecting mixed mode for use, the map that shows is that the map datum of navigation center combines with local map data stored, in the time can obtaining the map datum of navigation center's download, take the map datum of navigation center, under the situation that does not have navigation center's map datum, adopt local map data stored, thereby guaranteed the no time difference wait in navigation and the map view process.
The air navigation aid of a kind of map that combines based on local access and wireless downloading of the present invention on the display process of map, has following characteristics:
The one, because two data source is arranged, the map of wireless downloading can be used for guaranteeing the up-to-date of map and traffic information, the access of local map can guarantee to navigate and the map view process in the no time difference wait for.
The 2nd,, when communication network occurs unusual or user when being in the blind area, can't download available map sheet data at short notice, at this moment just can use the map grid data of this locality.
The 3rd,, use up the buffer memory map of download under certain conditions, and do not have new map sheet to use, terminal will automatically switch to local navigation mode so, treat that network service recovers normal, will download new real-time navigation grid map.
Owing to reasons such as restriction of actual traffic situation or gps signal drifts, in the time of actual the navigation, the situation of guidance path appears departing from through regular meeting.
At first, terminal can utilize local map datum to calculate and generate guidance path, so that can immediately recover navigation.The local mode that generates guidance path can be more timely, and response speed is faster, gives user's experience meeting better.Then the guidance path of terminal utilization generation restarts to navigate and downloads the required grid map of using.
If all download map again after departing from guidance path at every turn, will cause the waste of data volume, by realizing that in terminal the dynamic buffering technology can the part head it off.If twice guidance path the same along the map sheet data of guidance path, was not then downloaded the map sheet data again before and after terminal will compare.
The air navigation aid of a kind of map that combines based on local access and wireless downloading of the present invention, because what the map of local map and navigation center used is same set of ID encoding mechanism, therefore, the present invention utilizes these characteristics can realize the automatic renewal of local map.Car-mounted terminal with the renewal check code of each wireless downloading grid map and local grid map with same grid ID and the renewal check code compare, if it is different to upgrade check code, then upgrade local corresponding grid map, so just accomplished the automatic renewal of local map with the grid map of downloading.
The foregoing description only is used for further specifying the air navigation aid of a kind of map that combines based on local access and wireless downloading of the present invention; but the present invention is not limited to embodiment; every foundation technical spirit of the present invention all falls in the protection domain of technical solution of the present invention any simple modification, equivalent variations and modification that above embodiment did.
Claims (4)
1. the air navigation aid of a map that combines based on local access and wireless downloading comprises the display process to navigation map; It is characterized in that: this processing procedure comprises the steps:
A. the navigation center at far-end sets up the map data base that an electronic chart with this locality storage of car-mounted terminal has the identical data form; This map data base is the form that adopts grid map, under a pre-set engineer's scale, map is divided equally according to fixing sizing grid, under pre-designed grid ID numbering, with the grid is unit, and the map elements data of extracting grid inside generate the corresponding map data;
B. car-mounted terminal is according to the algorithm that pre-determines and utilize the latitude and longitude information of reference point to calculate the current map grid ID scope that shows of needing; Map grid ID scope includes minimum grid ID numbering and maximum mesh ID numbering;
C. whether car-mounted terminal is that local mode is judged to the map display mode; When being judged as when being, continue next step; When being judged as not, change step e;
D. car-mounted terminal extracts the map datum of grid ID one by one according to the map grid ID scope of current needs demonstration from local storage according to grid ID number order; After map datum has extracted, change step N;
E. car-mounted terminal sends the download such map requests that includes engineer's scale and grid ID scope by cordless communication network to the navigation center of far-end;
F. the engineer's scale uploaded according to car-mounted terminal of the navigation center of far-end and grid ID scope are transferred the corresponding map data distributing and are given car-mounted terminal from map data base;
G. car-mounted terminal is stored in the map datum that navigation center sent of far-end in the buffer area of car-mounted terminal;
H. whether car-mounted terminal is that network schemer is judged to the map display mode; When being judged as when being, continue next step; When being judged as not, change step J;
I. car-mounted terminal extracts the map datum of grid ID one by one according to the grid ID scope of current needs demonstration from buffer area according to grid ID number order; After map datum has extracted, change step N;
J. whether car-mounted terminal is judged in buffer area grid ID according to grid ID number order one by one according to the map grid ID scope that current needs show; When being judged as when being, change step K; When being judged as not, change step L;
K. car-mounted terminal extracts the map datum of corresponding grid ID from buffer area; Change step M;
L. car-mounted terminal extracts the map datum of corresponding grid ID from local storage;
M. whether car-mounted terminal is that the current maximum mesh ID numbering of the grid ID scope of demonstration that needs is judged to grid ID numbering; When being judged as when being, continue next step; When being judged as not, return step J;
N. the display process module of car-mounted terminal is carried out display process to the map datum that extracts.
2. the air navigation aid of the map that combines based on local access and wireless downloading according to claim 1, it is characterized in that: further, comprise also that in steps A navigation center carries out real-time update to map data base, the map datum after the renewal has the corresponding renewal check code with grid ID;
Comprise also that in step K the renewal check code that has the map datum of same grid ID from buffer area in the renewal check code of map datum of the grid ID that will extract and the local storage compares, when both are different, remove to upgrade the map datum that has same grid ID in the local storage with the map datum of the grid ID that extracts in the buffer area.
3. the air navigation aid of the map that combines based on local access and wireless downloading according to claim 1, it is characterized in that: described grid ID numbering is to be that initial point is (0 with latitude and longitude coordinates, 0) open numbering, vertical and horizontal add one mode by each grid ID value respectively and increase progressively.
4. the air navigation aid of the map that combines based on local access and wireless downloading according to claim 1 is characterized in that: describedly calculate the map grid ID scope that current needs show, it comprises the steps:
A. obtain the latitude and longitude information of reference point;
B. determine displayed map frame size according to the car-mounted terminal screen size, obtain the length and width value of displayed map frame;
C. get and decide the position of reference point in the ground picture frame;
D. converting to the reference point longitude and latitude with 1/1024 second is the value of unit;
E. with the length of ground picture frame with wide to convert to 1/1024 second be the value of unit;
What utilize f. that reference point coordinate and ground picture frame calculate ground the picture frame lower left corner and the upper right corner was the latitude and longitude value of unit with 1/1024 second;
G. obtaining grid length and width was the value of unit with 1/1024 second;
What h. obtain coordinate origin was the value of unit with 1/1024 second;
I. utilize origin, grid length and width value and the picture frame lower left corner, ground coordinate Calculation to go out the grid ID at place, the picture frame lower left corner, ground, this grid ID promptly is the minimum value of the scope of asking;
J. utilize origin, grid length and width value and the picture frame upper right corner, ground coordinate Calculation to go out the grid ID at place, the picture frame upper right corner, ground, this grid ID promptly is the maximal value of the scope of asking;
K. draw required grid ID scope, promptly grid ID minimum value is between the grid ID maximal value.
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| CN111212098A (en) * | 2018-11-21 | 2020-05-29 | 上海博泰悦臻网络技术服务有限公司 | Electronic map downloading method, system, electronic terminal and storage medium |
| CN109783125A (en) * | 2019-01-23 | 2019-05-21 | 苏州翔云瑞图信息技术有限公司 | High-precision map difference update method applied to automatic Pilot |
| CN110134755A (en) * | 2019-05-28 | 2019-08-16 | 北京百度网讯科技有限公司 | Map updating method, device, equipment, server and medium |
| CN112477926A (en) * | 2020-11-09 | 2021-03-12 | 北京全路通信信号研究设计院集团有限公司 | Electronic map management system and sending method |
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